In this video I make the gearing that drives the eclipse prediction function of the mechanism. Be sure to check out the reference links in the description box for more info on the Saros cycle, and other eclipse related stuff.

This video was done as a one-off viewer request but I like the format so I'm going to keep it going as a request driven series. Let me know in the YT comments if there is anything you want to see covered.

The precision of the holes in the Antikythera mechanism is one of the most fascinating aspects of its construction. In these 2 videos I make a tool that is capable of creating holes to the required standard, yet is consistent with the level of technology known to have existed in the period.

In this video I make the gearing that drives the Metonic, Callippic and Olympiad pointers. If you're interested in a bit more detail on the ancient Greek approach to calendars, then I recommend this excellent article on the Athenian calendars - https://www.ancient.eu/article/833/the-athenian-calendar/

One of the key tool technologies that needs to be explored around the Antikythera mechanism is the simple hand held file. So in these 2 Fragment videos I investigate the traditional processes used to make files in Antiquity. From hand cutting the teeth with a purpose made chisel, to hardening the file cutting surfaces using the original case hardening process. I have used materials consistent with the period, and reproduced the methods as close as I can get them to those practiced thousands of years ago.

One thing about this machine that is truly surprising, is just how small the teeth are.

There's a well established theory as to how the tooth divisions were marked out, but employing that process to mark out multiple wheels has forced me to question whether it can reasonably be applied to the Antikythera Mechanism.

So in this video I propose an alternative process of wheel division, using only the non precision tools of the period.​

In this episode the basic structure of the mechanism comes together, and I put forward a theory on a simple method for achieving the extremely close clearances observed in the original device.​Its an extra length episode for you folks, so please enjoy!​

As I was making this part I couldn't help wondering what it must have been like in that ancient Greek workshop, 2000 years ago. Doing the same job, seeing the same shapes come together... trying not to mess up those dovetails!! What did the shop look like? What were the tools? Was this a team effort, or the work of a single master? With all that hand filing, surely I was doing the "apprentice work"!

Anyway, I hope it fires up your imagination too, and I look forward to sharing more with you soon.